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Started By
Message
1
Posted on 6/12/23 at 1:50 pm to baldona
quote:
Why is closed loop cooling so difficult?
It's not difficult as a concept, it's the packaging that's presenting the problem. Putting a radiator, water lines, water pump, and cooling fan under the cowl is the problem
Posted on 6/12/23 at 3:40 pm to Barneyrb
It can be cooled by a simple keel cool system. Most mudboats with car engines have them now. If it can cool a V8 I'm sure it can keep up with a 50 Outboard.
My dads E72 Subaru mudboat has this set up since 1995 and still works great.
My dads E72 Subaru mudboat has this set up since 1995 and still works great.
Posted on 6/12/23 at 4:21 pm to tigerbait703
Keel cooling works great and I can't believe it STILL hasn't become mainstream
Posted on 6/12/23 at 4:31 pm to DownshiftAndFloorIt
I would assume the challenge is that the rigs that run air cooled motors now are attempting to draft as little as possible, and run through a lot of shite that would either frick up or cover a cooler in mud.
Posted on 6/12/23 at 4:40 pm to TheDrunkenTigah
Most are built into the bottom of the boat. It uses the water underneath to cool off the water in the keels and circulates through the motor and back to the keels.
It can sit at idol in the yard and just the amount of volume going through the keels are enough to keep the motor cool.
The key is to not have so much volume that the motor runs to cool. You want that engine running at operating temp.
It can sit at idol in the yard and just the amount of volume going through the keels are enough to keep the motor cool.
The key is to not have so much volume that the motor runs to cool. You want that engine running at operating temp.
This post was edited on 6/12/23 at 4:42 pm
Posted on 6/12/23 at 5:08 pm to tigerbait703
quote:
My dads E72 Subaru mudboat
Is that a removable outboard? Therein lies the problem with "keel" cooling
Posted on 6/12/23 at 5:22 pm to Barneyrb
Running a pair of coolant hoses from the engine to the Keel would be extremely simple.
Posted on 6/13/23 at 9:31 am to Barneyrb
quote:
Is that a removable outboard? Therein lies the problem with "keel" cooling
It is just as simple. Remove 2 hoses if taking off the boat. Would have to bleed air every time, but its not that big of a deal.
Posted on 6/13/23 at 9:45 am to Barneyrb
quote:
It's not difficult as a concept, it's the packaging that's presenting the problem. Putting a radiator, water lines, water pump, and cooling fan under the cowl is the problem
Could you not put a small system in the boat itself and not under the cowl? Run a water hose just like you run a gas hose? I'm not sure what kind of pressure/ volume you would need but even a 300hp outboard doesn't have a lot of volume out the tell tale?
I was thinking you could set something up like a 10 gallon tank of water inside the boat and have a water line to and from? IDK
ETA: Obviously an inboard is inside the boat, but aren't there freshwater cooled inboards?
This post was edited on 6/13/23 at 9:46 am
Posted on 9/7/23 at 4:01 am to tigerbait703
This is essentially what they have done. Its hard to imagine the water cooling enough by running the keel, but looks well-designed in person. Id sure like to read about some real world test results. I havent seen much on these all Summer.
Posted on 9/7/23 at 5:48 am to TigerFWTX
Big diesel engines have been Keel cooled forever. It works great and isn't complicated at all. They'll sell em faster than they can build em
Posted on 9/7/23 at 8:22 am to tigerbait703
I'm over this lawn mower Frankenstein outboard bs.....
Didnt Boss Drives try this when they made there 75Hp Boss Hoss or whatever they called it.
I'm going back to a big mud boat after this season. Will either be a v6 or a v8 and have all the power i need to bust through. Problem with surface drives is they are terrible in lilies and the amount of money you spend now a days u might as well have build something. If you know what you doing i can run a v4-V8 anywhere a surface drive can go in the marsh.
Didnt Boss Drives try this when they made there 75Hp Boss Hoss or whatever they called it.
I'm going back to a big mud boat after this season. Will either be a v6 or a v8 and have all the power i need to bust through. Problem with surface drives is they are terrible in lilies and the amount of money you spend now a days u might as well have build something. If you know what you doing i can run a v4-V8 anywhere a surface drive can go in the marsh.
Posted on 9/7/23 at 8:54 am to LSUDUCKMAN67
Yeah, in the marsh. Try that anywhere else. Surface drives are more versatile
Posted on 9/7/23 at 9:13 am to Park duck
There’s really 2 items here, cooling and exhaust. The pro drive has an external exhaust right? So is it not still loud? Outboards exhaust under water through the prop which isn’t possible here so it would still be loud right?
Posted on 9/7/23 at 9:28 am to baldona
I'm sure it's still louder than an outboard but shouldnt be too much. A ton of the air cooled engine noise is just mechanical noise. The water jacket dampens all the mechanical stuff out a ton, and you can have a cowling on water cooled engines to help even more. Quieting down the exhaust is super easy. It should be a very drastic difference.
Posted on 9/7/23 at 9:52 am to DownshiftAndFloorIt
quote:
I'm sure it's still louder than an outboard but shouldnt be too much. A ton of the air cooled engine noise is just mechanical noise. The water jacket dampens all the mechanical stuff out a ton, and you can have a cowling on water cooled engines to help even more. Quieting down the exhaust is super easy. It should be a very drastic difference.
Then why not do all those to the other air cooled engines?
Posted on 9/7/23 at 10:38 am to baldona
You can't put a cowling on an air cooled engine because it needs too much air flow
You can't put a water jacket because you need the surface area to cool the engine
You CAN put a muffler that will reduce the exhaust noise significantly on an air cooled engine, but that doesn't do anything for all the mechanical noise.
You can't put a water jacket because you need the surface area to cool the engine
You CAN put a muffler that will reduce the exhaust noise significantly on an air cooled engine, but that doesn't do anything for all the mechanical noise.
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